A medical inspector of the department of labor shall require any minor sixteen or seventeen years of age employed in or in connection with any trade, business, or service, to submit to a physical examination by him if in his judgment such minor is physically unfit for the work at which he is employed. The result shall be recorded on a form filed with the commissioner.

If such minor fails to submit to such examination or if on examination the inspector finds the minor physically unfit to be so employed, he shall so report to the commissioner with his reasons therefor and the commissioner, if he approves the report, shall then cause the employment certificate issued in accordance with the education law to be taken from the office of the employer and shall return the same to the superintendent of schools recommending its cancellation.